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Figure I and Figure II are similar figures.
Figure I
Figure II
Which proportion must be true?

(RS)/(AB)=(TU)/(CD)quad(TU)/(AB)=(UV)/(AF)
Option 1
Option 2

(ST)/(EF)=(WR)/(CD)quad(WV)/(AB)=(ST)/(EF)

Figure I and Figure II are similar figures.\newlineFigure I\newlineFigure II\newlineWhich proportion must be true?\newlineRSAB=TUCDTUAB=UVAF \frac{R S}{A B}=\frac{T U}{C D} \quad \frac{T U}{A B}=\frac{U V}{A F} \newlineOption 11\newlineOption 22\newlineSTEF=WRCDWVAB=STEF \frac{S T}{E F}=\frac{W R}{C D} \quad \frac{W V}{A B}=\frac{S T}{E F}

Full solution

Q. Figure I and Figure II are similar figures.\newlineFigure I\newlineFigure II\newlineWhich proportion must be true?\newlineRSAB=TUCDTUAB=UVAF \frac{R S}{A B}=\frac{T U}{C D} \quad \frac{T U}{A B}=\frac{U V}{A F} \newlineOption 11\newlineOption 22\newlineSTEF=WRCDWVAB=STEF \frac{S T}{E F}=\frac{W R}{C D} \quad \frac{W V}{A B}=\frac{S T}{E F}
  1. Identify Similar Figures: Since the figures are similar, corresponding sides are in proportion.
  2. Match Corresponding Sides: We need to match the corresponding sides of Figure II and Figure IIII to set up the correct proportion.
  3. Set Up Proportions: If RSRS corresponds to TUTU and ABAB corresponds to CDCD, then the proportion (RS)/(AB)=(TU)/(CD)(RS)/(AB) = (TU)/(CD) should be true.
  4. Verify Proportions: Similarly, if STST corresponds to WVWV and EFEF corresponds to ABAB, then the proportion STEF=WRCD\frac{ST}{EF} = \frac{WR}{CD} should be true.
  5. Select Correct Option: The other proportions given do not match corresponding sides correctly, so they can't be true.
  6. Select Correct Option: The other proportions given do not match corresponding sides correctly, so they can't be true.Therefore, Option 11 is the correct proportion.

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